Steam generator



FIG. 1 is a front perspective view of the steam generator of the presentinvention;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a rear elevation view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The ornamental design for a steam generator, as shown and described. 